fix gemspec -- README.txt sub md
fix gemspec -- README.txt sub md

mirah/mirah,KeenS/mirah,KeenS/mirah,aspleenic/mirah,uujava/mirah,felixvf/mirah,mirah/mirah,aspleenic/mirah,uujava/mirah,felixvf/mirah,KeenS/mirah,aspleenic/mirah,felixvf/mirah,KeenS/mirah,felixvf/mirah,mirah/mirah,mirah/mirah,uujava/mirah,uujava/mirah,aspleenic/mirah,aspleenic/mirah,uujava/mirah